funded by cbs and ford >> simon: tonight, you will not hear from world leaders about the greatness of nelson mandela, but from the people closest to him-- from the people who called him by his clan name, "madiba." what they saw and admired more than anything else was his power of forgiveness, how he forgave the people who had stolen his life from him. you will see him tonight not as nelson the man who liberated a nation, but as madiba-- father, husband, cellmate, friend. >> you know, most people of my generation, they ask the question, you know, do you remember when kennedy was shot? well, i remember that as well, but a much more moving day for me, and one that's more defining is the 28th of june, 2005, when that helicopter was shot down and three of my men were killed on the ground. >> it was unbelievable. >> cooper: marcus luttrel was on the ground, part of a four-man seal team that was heavily outmanned and outgunned against a dangerous militia aligned with the taliban. >> you know, they say every man has his breaking point. i never thought i'd find mine. the only way you break a navy sea